40421047 has 2 divisors, whose sum is σ = 40421048. Its totient is φ = 40421046.

The previous prime is 40421027. The next prime is 40421071. The reversal of 40421047 is 74012404.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40421047 is a prime.

It is a super-2 number, since 2×40421047² = 3267722081152418, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40421027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20210523 + 20210524.

It is an arithmetic number, because the mean of its divisors is an integer number (20210524).

Almost surely, 2^40421047 is an apocalyptic number.

40421047 is a deficient number, since it is larger than the sum of its proper divisors (1).

40421047 is an equidigital number, since it uses as much as digits as its factorization.

40421047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 40421047 is about 6357.7548710217. The cubic root of 40421047 is about 343.1909705017.

The spelling of 40421047 in words is "forty million, four hundred twenty-one thousand, forty-seven".